On May 8, 10:14*am, "Ray" wrote:
We live in a six-unit coop apartment building with an oil-fired boiler which
supplies radiator heat throughout the building.

We installed a new boiler in 2006 at a cost of $28,000. At the time we
considered switching from oil to gas, but were told that we likely would
have to run new gas supply lines from the street to the building, and this
could cost as much as $20,000. So we opted to continue with oil.

Based on current prices, gas costs only about half as much as oil to produce
the same heat. So we are reconsidering switching to gas.

Leaving aside the cost of installing new gas-supply lines, can anyone give
me a ballpark figure on how much it would cost to switch the new furnace
from oil to gas? Or possibly even have a dual supply system so that we could
switch to gas or oil depending upon the costs at a given time?

20000 to run a gas line? the gas co might do it free, and all you will
need is the indoor line and a new burner with controls.